| Value | Category | Cases | |
|---|---|---|---|
| 1 | Daily or almost daily | 19 |
0.6%
|
| 2 | Weekly | 18 |
0.5%
|
| 3 | Monthly | 21 |
0.6%
|
| 4 | Less than monthly | 169 |
5.1%
|
| 5 | Never | 3060 |
93.1%
|
| Sysmiss | 810 |